Self-binder for harvesters.



No. 801,988. PATENTED OUT. 17, 1905.

E. A. JOHNSTON.

SELF BINDER FOR HARVESTERS.

APPLIOATION FILED MAR.13v 1905.

3 SHEETS-SHEET 1.

WITNESSES: I INVENTOR.

ATTORNEY$ ANDREW a mum cu NCHQLIWDGRAPHERS. WISHNGYUN, n c

PATENTBD OCT. 17, 1905.

E. A. JOHNSTON.

SELF BINDER FOR HARVESTERS.

APPLICATION FILED MAR.18. 1905.

3 SHEETS--SHBET 2.

WITNESSES: 2% W INVENTOR.

ATTORNEYS No. 801,988. PATBNTED OCT. 17, 1905. B. A. JOHNSTON.

SELF BINDER FOR HARVESTERS. APPLICATION rmzn MAB-13. 1905.

3 SHEETS-SHEET 3.

INVENTOR. i Y

ANDFEW a. emu! co. mamumunumcas. wlsuwcwm a c UNITED STATES FFIQE.

PATENT SELF-BINDER FOR HARVESTERS.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed March 13, 1905. Serial No. 249,798.

To aZZ whom, it may concern:

Be it known that I, EDWARD A. JOHNSTON, a citizen of the United States,residing atSterling, Whiteside county, State of Illinois, have in ventedcertain new and useful Improvements in Self-Binders for Harvesters; andIdo hereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention relates to self-binders for grain-harvesters and the like,and relates more especially to the means for throwing the bindingdevices into and out of action at the beginningand completion,respectively, of the operation of binding the bundles. It is essentialto the efiicient working of these machines that the binding devicesshould start easily and promptly on the accumulation of sufficient grainto exert the predetermined amount of pressure on the trip hook, and itis equally necessary that these devices should be thrown out ofoperation without the rebound which the shocks and jars that areincidental to the intermittent operation are liable to cause.

WVith these ends in view the invention consists in a novel constructionand manner of operating the trip-stop, so that at the proper time it isthrown out of the way of the roller on the crank of the trip-shaft topermit the trip-hook to fall out of the way of the bundle and allow thelatter to be discharged, also so that the trip-stop will be returned toposition promptly on the descent of the needle and in so doing willassist the restoration of the triphook into operative position and aidin throwing the binder home and will also form a backstop to counteractthe rebound.

The invention is illustrated in the accompanying drawings, where Figure1 is a plan view of a binder attachment with my invention applied. Fig.2 is an end view of the same looking from the front of the machine. Fig.3 is an end view looking from the rear side of the machine, theknottershaft and mechanism being omitted and part of the frame-castingbeing shown in dotted lines. Fig. 4 is adetail view showing in sectionin full lines the trip-stop and its carrier, the trip-dog being shown indotted lines; and Fig. 5 is a cross-section of the part shown in Fig. 2on the line 5 5 looking upward in the direction of the arrows.

Referring to the views, a, wherever occurring, indicates parts of thebinder-frame casting,which is or may be of any preferred construction.Power to drive the binder is taken from the packer-shaft b, which isdriven in the usual way by a chain belt 7) and has a bevel-pinion c onits forward end. The pinion c meshes with a gear d on the lower end of ashaft (not shown) that isjournaled in the vertical part of thebinder-frame casting and carriesa beveled pinion c at its upper end.This pinion meshes with a bevel-gearf, which is loosely mounted on theknotter-operating shaft g, that is journaled in the overhanging part ofthe frame-casting a, so that the gear f is constantly driven from thepacker-shaft.

The needle z'is mounted, as usual, on the shaft it, that is oscillatedfrom an intermittently-rotated cam-disk Z, fast on the knotteroperatingshaft close alongside the gear f, the. needle-shaft being connected tothis camdisk by the usual pitman and crank-arm 7:1, so that theneedle-shaft and knotter-operating shaft are actuated concurrently, theformer being given an oscillation to cause the needle to apply the bandaround the bundle and the other being given a single revolution to causethe knotter mechanism to tie the knot.

It being understood that the gear f is constantly driven, the cam-diskZ, which is the immediate driver for all the binding devices except thepackers, is clutched to the gear by the pressure of the grain againstthe triphook p. This hook is mounted, as usual, on an arm q, projectingfrom the trip-shaft r, and is raised nearly to its operative position bya heel projection s from the needle-hub in the ordinary manner. At itsforward end the trip-shaft has a crank t, carrying a roller whichreleases a spring actuated trip dog when the trip-shaft is rocked andallows the dog to clutch the cam-disk Z to the gear fin a manner wellunderstood in this class of machines. In the present invention thistripdog, which is denoted by m, is pivotally connected at its upper endto a plate-like projection 02, fast on the outer side of the cam-disk Z,so that the arm lies fiatwise against the side of the disk, as bestshown in Figs. 1 and 2. The disk has a peripheral flange on the sidenext to the gear f, and this gear has an annular flange f, which fitswithin the flange of the cam-disk and has notches or recesses 9 aroundits inner periphery. The trip-dog on has a projection m extending intothe space inclosed by flange f of the gear f and carries a roller 0,which is normally thrown outward by a spring 20, soas to engage one ofthe recesses p, and thereby lock the disk and gear together. At itslower end the trip-dog has a lateral projection :12, which is in thepath of a similar projection u on a trip-stop u, so that when the dogstrikes the stop the spring w is compressed and the roller 0 is thrownout of the recess 7), thereby disconnecting the cam-disk Z from the gearf and stopping the disk, while the wheel continues its rotation.

The trip-stop a has at its lower end a foot 10 against which the rolleron the crank 2. of the trip-shaft bears when the cam-disk Zis disengagedfrom the gearf and the binder is out of action. The trip-stop is mountedto slide in a rocking carrier-arm a, that is pivoted at a to theframe-casting just under the cam-disk Z. At its upper end it has theprojection a already referred to, and at its lower end it has aninclined toe 2Z3, which is best shown in Fig. 4: and will be referred tolater on. The foot 14 0f the trip-stop has a rod Z)" secured to it,which extends upwardly and parallel with the body portion of the stopand passes loosely at its upper end through a per-' 'end of the rod andthe projection 0 on the carrier 0' at the upper end of the rod. Theouter spring holds the trip stop normally downward, so that its foot 1Z2rests against the roller on the crank t of the trip-stop shaft and sothat the projection u at its upper end lies normally in the path of theprojection on the lower end of the trip-dog. This outer springconstitutes the trip-spring proper and has the proper tension to holdthe trip-hook 11 against whatever pressure the binder has been set tostart at. The inner spring is not normally under tension and is onlyintended to come into operation when a bundle of unusual size gets intothe binder and an increased amount of movement of the trip-stop isnecessary to relieve the pressure on the trip-hook and'its shaft. Atthis time the flange on the lower end of the sleeve d strikes the lug 0and the inner spring begins to act, so that during any further movementof the stop both springs act as compressionsprings.

The trip-stop carrier (4 is made into the form of a bell-crank lever, asshown in Figs. 3 and 4. 1t is held normally in position with its footover the roller 6" of the trip-shaft arm 2. by a spring 0 secured at itsupper end to a lug Z on the binder-casting and preferably bowed, asshown in the drawings, so as to operate against the lower arm (4* of thetripshaft carrier.

After the binder has been tripped into action, as already described, andthe bundle has been bound the foot of the trip-stop must get out of theway of the roller 6 in order to permit the trip-hook to fall and releasethe bundle. This is effected by a cam-rim b, that is formed on the diskZ. This disk rotates in the direction of the arrow, Fig. 3, and justafter the knot has been tied it strikes a roller 0 on the upper arm ofthe trip-stop carrier and swings the carrier from the position shown infull lines in Fig. 3 to that shown in dotted lines, thereby releasingthe roller 6 and permitting the trip-hook to fall beneath the deck, asshown in dotted lines.

After the bundle has been discharged it is necessary that the trip-hookshould be brought up promptly into position to receive the next bundle.This is effected, as already described, by the projection s from theneedle. After the needle is down it is necessary that the arm 9, whichcarries the trip-hook, should be raised slightly from the projection son the heel of the needle, so as to allow the hook p to have sufficientmovement to trip the binder. This is etfected by the spring 0 throwingthe lower arm of the trip-stop carrier forcibly outward, so thatitsinclined toe u strikes the roller on the arm 25 of the trip-shaft,forcing it down into the position shown in full lines in all thefigures.

As shown in Fig. 3, the rim 5* extends only about half-way around thecam-disk Z, and its rear end is inclined outwardly, as shown at Z.

The disk reaches the position shown in this figure immediately after thebundle has been discharged, and, as will be seen from the drawings, theroller 0 is then free to leave the cam under the tension of the spring 0which presses the lower arm of the trip-stop carrier outward. Thisforces the roller 0* to ride upon the inclined tail t of the rim 5' andnot only helps to throw the binder home, but in case the cam should tendto rebound prevents any movementof the disk in the reverse direction tothat of the arrow in the figure.

As before stated, the trip-dog is pivotally connected to the cam-disk Zand lies flatwise against its outer side. It is held normally inposition to lock the cam-disk to the gear f" by the spring w, and thedog necessarily has considerable play. For this reason I provide a lug ton the disk Z just behind the dog, so that when the lower end of the dogstrikes the trip-stop and its roller 0 is disengaged from the notches ofthe gear f the lug will immediately engage the rear edge of the dog, theplay between the parts will be taken up, and a rigid connection will beestablished between the dog and thedisk, thus forming a substantial stopto receive the blow caused by the dog striking the trip-stop.

The arrangement and operation of the several parts being as thusdescribed, it will be noted that the construction of the binder is lightand strong and that the manner of mounting the trip-hook in anoscillating carrier and swinging it as and by the means describedinsures in the first place that there shall be no impediment to the freeand easy discharge of the bound bundle and in the next place thatprovision is made for promptly and easily restoring the parts intoposition ready for another bundle without liability of the shocks andjars causing the binder to rebound.

Except as hereinafter claimed there is no particular novelty in theconstruction or arrangement of any of the parts of the binder; but I donot intend to be limited to the particular construction or arrangementof the oscillating trip-stop carrier or any of the other parts formingfeatures of the present invention.

Having thus described the invention, what 1 claim, and desire to secureby Letters Patent, is-

l. A self-binder, having in combination a pivoted vertically-swingingtrip-stop, a triphook, a trip-hook shaft, a crank on the triphook shaftunder the foot of the stop, and a cam on the knotter-operating shaft forswinging the stop out of the way of the crank to permit the hook tofall.

2. A self-binder having in combination a vertically-swinging trip-stop,a trip-hook, a trip-hook shaft having a crank, means for swinging thestop out of the way of the crank so that the said hook may fall, andmeans for forcing said stop against said crank prior to the completionof its return movement, said stop being adapted to force said crank outof its path and thereby throw the crank and its connected hook intoposition.

3. A self-binder, having in combination a pivoted vertically-swingingtrip-stop, a triphook, a trip-hook shaft having a crank, means forswinging the stop with its foot over the crank to restore the trip-hookto position, and

a cam on the knotter-operating shaft cooperating with the stop toprevent rebound of the binder.

4:. A self-binder, having in combination a pivoted vertically-swingingtrip-stop, a triphook, a trip-hook shaft having a crank, a cam on theknotter-operating shaft for swinging the stop out of the way of thecrank to permit the hook to fall, a spring for returning the stop withits foot over the crank to restore the trip-hook to position, thestop-swinging cam on the knotter-operating shaft having a deflection atits rear end to cooperate with the stop and prevent the rebound of thebinder.

5. In a self-binder, the combination of the trip-hook shaft, thetrip-hook, a crank on the shaft, and a trip-dog, thetrip-stop'comprising a pair of springs, only one of which is undertension in the tripping movement of the stop, and the other of which isput under tension by any further movement of the stop.

6. The combination to form a trip-stop for self-binders, of a carrier, atrip-stop sliding therein and having a foot, a rod connected to the footand sliding through a lug on the carrier, a sleeve loose on the upperend of the rod, a spring not under tension located between the sleeveand a collar on the rod, and a spring under tension between the rod andthe lug on the carrier.

7. The combination to form a trip-stop for self-binders, of a trip-stop,an oscillating carrier therefor, consisting of a two-armed pivoted leverin bearings in one arm of which the stop slides, a rod connected to thefoot of the stop and sliding through a lug on the arm of the carrier, .asleeve loose on the upper end of the rod, a spring not under tensionlocated between the sleeve and a collar on the lower end of the rod, anda spring under tension between the rod and the lug on the arm of thecarrier.

8. In a self-binder, the combination of the knotter-operating shaft, acontinuously-operating gear thereon, a disk fast on the shaft, atrip-dog pivotally connected to the disk and acting to lock the disk andcam together, a stop for tripping the dog, and a lug on the disk behindthe dog against which the dog strikes when it is tripped.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD A. JOHNSTON.

Witnesses:

E. R. THOMPSON, F. B. FRERICHS.

